Challenge your critical thinking with top aptitude and logical reasoning questions covering topics like averages, ratios, age problems, and number series, designed for competitive exam preparation.
The ages of three friends are 24, 27, and 31 years. What is their average age?
Explanation: The average is found by adding the ages (24 + 27 + 31 = 82) and dividing by 3, giving 27.33 years. The second option is too low, the third averages only two of the values, and the fourth reflects the age of the oldest alone.
Which number should replace the question mark in the series: 5, 9, 17, 33, ?
Explanation: The pattern is multiplying by 2 and subtracting 1: (5×2)-1=9, (9×2)-1=17, (17×2)-1=33, so next is (33×2)-1=65. Other options do not fit this rule.
If the ratio of boys to girls in a class is 3:2, which option could be the total number of students?
Explanation: A 3:2 ratio means total parts are 5; 25 divides perfectly as 3:2 (15 boys, 10 girls). The other totals are not divisible into integer groups maintaining the 3:2 ratio.
What is the simple interest on a sum of ₹2000 at 5% per annum for 2 years?
Explanation: Simple interest = Principal × Rate × Time ÷ 100; thus (2000×5×2)/100 = ₹200. Other options result from incorrect calculations or using the formula wrongly.
Which of the following does NOT belong in the group: Triangle, Rectangle, Cube, Circle?
Explanation: Triangle, rectangle, and circle are two-dimensional shapes, whereas cube is three-dimensional. The other choices are all flat shapes, making cube the odd one out.