Question

15. Twice a number when decreased by 7 gives, 15 find the number.
16. A number is - times another number, if their sum is 70, find the numbers.
17. A number is as much greater than 21 as it is less than 71. Find the number.
18. The sum of ages of father and son is 75 years. If the age of the son is 25 years, find the age of father
19. Find the multiple of 8, if the sum of two consecutive multiples of 8 is 184.
20. It two complementary angles differ by 20°, find the measure of each angles.
21. Two supplementary angles differ by 40°. Find their measure.
22. If 2 is subtracted from a number, then tripled, the result is 4 more than the given number. Find the
number.
23. The numerator of a rational number is 7 less than the denominator. If the denominator is increased by
9 and the numerator is also increased by 2, we again get the same rational number. Determine the
number
24. The combined cost of a T.V. and a fan is 13000. The cost of T.V. is 12 times the cost of the fan. Find the
cost of each
25. After 12 years. Manoj will be 3 times as old as he was 4 yrs ago. What is his present age?
26. The age of Nishant and Sanjay are in the ratio 4:5. Ten years hence the ration of their ages will be bik
Find their present ages.
Answers
1
Adding to the​

Answer 1

Answer:

11

Step-by-step explanation:

15.Let it x

Then

2x-7=15

2x=15+7

2x=22

X=22/2

X=11

Answer 2

Let one of the angles is x then other is x+20

We are given, x+x+20 = 90°

2x+20 = 90°

so, 2x = 70°

so, x =35°

so Angles are 35° and 55°

answers 20 ka hai