Question
A girl found the answer for the question “subtract the
sum 1/4 and 1/8 from unity and express the answer in decimals” as 1.5. The percentage of error in her answer was?Solution
Correct answer = 1 - (1/4+1/8) = 1 - ((2+1)/8) ⇒ 1 - 3/8 = 5/8 = 0.625 Difference in answer = 1.5 - 0.625 = 0.875 Required percentage = 0.875/0.625 × 100 = 140 %
169, 224, 293, 385, 497, 629
Find the wrong number in the given number series.
20, 33, 50, 69, 93, 121
25 26 28 32 42 56
Find the wrong number in the given number series.
8, 12, 23, 40, 66, 103
8137, 5405, 3669, 2701, 2201, 1997
Find the wrong number in the given number series.
78, 66, 51, 39, 20, 12
2824 2314 1973 1759 1634 1574
In each of the following number series, one term is wrong. Find the wrong term.
3, 7, 13, 21, 31, 42, 57
Find the wrong term in the given series below.
2847, 2954, 2799, 3088, 2727, 3256
Find the wrong number in the given number series.
2, 5, 10, 17, 26, 38, 50
