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Class 8 Algebra: Forming Algebraic Expressions Questions and Answers

Class 8 Algebra: Forming Algebraic Expressions Questions and Answers:
In this session, we are going to work out questions on forming algebraic expressions. Answers are in video format.

Lessons (21)

• 1.    A father is 3 times as old as his son. Which of the following expressions describe their ages five years ago if the son is X years old now?
  1m 37s

• 2.    Galgalo, Al, Bii and Sawe shared sweets as follows: Galgalo got 6x sweets which was three times as many as Ali. Sawe got 6 more sweets than Ali. Bii got half as many sweets as Sawe. Which of the following expressions shows the number of sweets that Bii got? A. X+3 B. X+6 C. 9x+3 D. 2x+6
  3m 25s

• 3.    Jamil bought x mangoes and Musa bought y mangoes. Amina bought three more mangoes than Jamil. How many mangoes did the three of them buy together? A. 2x+y+3 B. X+y+3 C. 4x+y D. 2y+x+3
  2m 8s

• 4.    In the examination, Kirui scored s marks in English, r marks in mathematics and 7 marks less in science than in mathematic. What was his total score in the three subjects? A. s+r-7 B. s+2r-7 C. s+2r+7 D. s+r+7
  2m 40s

• 5.    Njeri bought p bananas and Atieno bought q bananas. Shariffa bought two bananas less than what Njeri bought and Atieno had bought. How many bananas did all the three buy? A. p+q-2 B. p+q+2 C. 2p+2q-2 D. 2p+2q+2
  3m 17s

• 6.    Kurgat has m mangoes. Omolo has two more mangoes than Kurgat. Wanja has five mangoes less than the total number that Kurgat and Omolo have. How many mangoes do they have altogether? A. 4m-1 B. 6m-5 C. 4m+9 D. 3m-1
  5m 12s

• 7.    Nekesa is x years old now. She is y years older than her son. Which of the following expressions represents the sum of their ages in ten years’ time? A. x-y+10 B. x+y+20 C. 2x-y+20 D. 2x-y+10
  3m 22s

• 8.    A group of q girls went on a picnic. They spent sh p each on food and a total of sh r on transport. Which one of the following expressions represents the cost per girl? A. #frac{pq+r}{q}# B. #frac{p+q+r}{q}# C. #frac{pqr}{q}# D. #frac{p+qr}{q}#
  2m 52s

• 9.    In a cupboard there are pencils, rulers and books. The number of pencils is 15 more than that of rulers. The number of books is three times that of ruler. If the number of pencils is p, which one of the following expressions below represents the total number of items in the cupboard? A. 5p-60 B. 3p-27 C. 5p+60 D. 5p-30
  4m 8s

• 10.    Musa, Tom and Sam scored goals for their teams during a football match. Musa scored n goals while Sam scored twice as many goals as Musa. Tom scored two goals less than Sam. What was their total score? A. 5n-2 B. 2n-2 C. 3n-2 D. 3n+2
  2m 58s

• 11.    Agola bought n oranges and Mwangi bought n+1 oranges. Mueni bought twice as many oranges as both Agola and Mwangi. Which one of the following expressions shows the total number of oranges they bought? A. 6n+3 B. 5n+2 C. 4n+2 D. 2n+3
  2m 44s

• 12.    Nekesa has p pencils. Rhoda has 3 more pencils than Nekesa. Karani has two pencils less than the total number that Nekesa and Rhoda have. How many pencils do they have altogether? A. 8p-2 B. 4p+4 C. 2p+1 D. 2p+4
  3m 20s

• 13.    On a farm there are cows, goats and sheep. The number of goats is twice the number of cows while the number of sheep is 25 less than the number of goats. If the number of goats is g, how many animals are on the farm? A. #2 1/2#g-25 B. #2 1/2#g +25 C. 4g-25 D. g-25
  2m 42s

• 14.    A father shared money among his three children Mulwa, wangare and Achesa. Wangare received sh. 10 more than Achesa, while Mulwa got twice the amount wangare got. If Achesa received sh. x, which one of the following expressions represents the total amount of money given to the three children? A. 4x+30 B. 4x+10 C. 2x+20 D. 3x+30
  3m 36s

• 15.    Ali is now two years older than Martha. If martha’s age is represented by x, what will be their total ages after 10 years? A. 2x+22 B. 3x+20 C. x+22 D. 2x+18
  2m 22s

• 16.    Wanja bought 2kg of peas @ sh 80, 3kg of maize @sh 60and 10kg of potatoes for sh.100. If Wanja spend sh. x to buy the peas, sh y to buy the maize and sh z to buy the potatoes, which one of the equations below represents the total amount of money spent by Wanja? A. x+y+z=440 B. x+y+z=240 C. x+y+z=340 D. x+y+z=1340
  3m 21s

• 17.    Ndemo bought 2r oranges while Maua bought 4s oranges. Haifa bought 2 oranges more than a half total number of oranges bought by both Ndemo and Maua. How many oranges did they bought altogether? A. 3r+6s+2 B. 4r+8s+2 C. 6r+12s+2 D. 3r+6s-2
  3m 58s

• 18.    Chepkoech has k bananas. Omollo has two more bananas than Chepkoech. Nekesa has three Bananas less than the total number that both Chepkoech and Omollo have. How many bananas do they have altogether? A. 4k+1 B. 4k+3 C. 4k+4 D. 4k+7
  3m 18s

• 19.    Karai is x years old and twoyears older than his wife. In ten years’ time he will be 3 times as old as his daughter. What will be their total age then? A. 5x+48 B. #2 1/3#x+#25 1/3# C. #2 1/3#x+8 D.#2 1/3#+#21 1/3#
  3m 30s

• 20.    Omondi had two children, Tina and Ahmed. When tina was born Ahmed was 4 years old, Omondi was m years old while his wife was 5 years younger than him. What is their total age after 10 years? A. 2m +9 B. m+19 C. 2m+39 D. 2m+49
  3m 0s

• 21.    Musa bought x bananas and Maria bought 4 bananas more than Musa. Otieno bought twice as many bananas as both Musa and Maria. The total number of bananas bought altogether was 30. Which one of the following equations can be used to find the number ofbananas Musa bought? A. 6x+12=30 B. 4x+8=30 C. 2x+6=30 D. 3x+6=30
  3m 39s