Question

Practice Exercise

4.2

1. By adding 7 to twice a number, we obtain 49. Find the number. 2+ 2. By subtracting 22 from three times a number, we obtain 68. Find the number.32-22-8

3. Find a number which when multiplied by 7 and then reduced by 3 is equal to 53. 4. Sum of two numbers is 95. If one exceeds the other by 3, find the numbers. +3=15 LS Sum of three consecutive integers is 24. Find the integers. Present age of Subramaniam's mother is six times Subramaniam's age. Five years hence,

her age will be 20 years more than that of Subramaniam's age. Find their present ages. 7. Length of a rectangle exceeds its breadth by 4 m. If the perimeter of the rectangle is 84 m. find the length and breadth of the rectangle.

8. After 15 years, Sheela's age will become four times that of her present age. Find her present

age.

9. A sum of 3000 is to be given in the form of 63 prizes. If a prize is of either 100 find the number of prizes of each type. 10. A purse contains ? 250 in notes of denominations of 10 and 50. If the number of 10-rupee

or of 25,

notes is one more than that of 50-rupee notes, find the number of notes of each. denomination. 11. Length of a rectangle is 2 cm more than twice its breadth. If the perimeter of the rectangle is

28 cm, find its length and breadth.

12. A number is divided into two parts such that one part is 10 more than the other. If the two parts are in the ratio 5:3, find the number and the two parts.

13. In a class of 35 students, the number. I girls is 2/5 of the boys. Find the number of boys in the class. 14. A total of 50000 is to be distributed among 200 persons as prizes. A prize is either ? 500 or

*100. Find the number of each type of prizes.

15. Shanti Lal left one-fifth of his property for his son, one-fifth for his daughter and the

remainder for his wife. If wife's share in the property was worth 288000, find the total

worth of Shanti Lal's property. 16. If 1/2 is subtracted from a number and the difference is multiplied by 4, the result is 5. Find the number.

17. Amarjeet has a rectangular plot of land that has been fenced with 300 dimensions of the plot, if its length is twice the breadth. 2¹ 18. Hamida has three boxes of different fruits. Box A weighs 2 kg more than box B and box C

m long wire. Find the

4821 weighs 10¹ kg more than box B. If the total weight of the three boxes is 48 kg, find the weight of box A. 19. Sarita and Julie start walking from the same place in the opposite directions. If Julie walks

at a speed of 2 km/h and Sarita at a speed of 2 km/h, in how much time will they be 18 km

apart?

20. One-fourth of a herd of deer have gone to the forest. One-third of total number are grazing in a field and remaining 15 are drinking water on the bank of a river. Find the total number of deer.

51​

Answer 1

Answer:

1) 7×7 = 49, so 2+2 is actually 2×2 = 4.

22+22+24 = 68, so 32 - 22 - 8 is actually 32 + 22 + 8 = 62.

2) 8×7 = 53.

21 + 23 + 26 + 25 = 95

:( sorry I can't do the rest of them cuz I have to complete my hw too.