Question
P says to Q ‘’ I am thrice as old as you were when
I was as old as you are’’. The sum of their ages is 100 years. Find the difference of their ages?Solution
P says to Q ‘’ I am thrice as sold as you were when I was as old as you are’’ i.e P = 3[Q-(P-Q)] P = 3 [2Q-P] P = 6 Q – 3P 4P = 6 Q…………(i) P + Q = 100…………(ii) From (i) and (ii), we get P = 40 years and Q = 60 years Hence, difference of their ages = 60 – 40 = 20 years
Find the missing number, in the given number series.
42, 52, 72, 112, 192, ?
[(145)² ÷ 25 × 52] ÷ ? = 29 × 13
- What will come in place of (?) in the given number series.
121, 100, 81, 64, ?, 36 143 119 107 101 98 ?
Choose the missing term?
B, D, F, I, L, P, ?
32, 42, 62, 92, ?, 182
What value should come in the place of (?) in the following number series?
64, 80, 104, ?, 176, 224
- 6, ?, 9816, 9825, 19429, 19438
900 90 18 ? 2.16 1.08
- What will come in place of the question mark (?) in the following series?
10, 17, 26, 37, 50, ?