A. Bhattacharjee Solutions for Chapter: Test of Reasoning / Mental Ability, Exercise 5: Exercise 5

In a class, compulsory Hindi is being taught, half the class is studying two other languages also. One-fourth of those studying $3$ languages, can only converse in two languages and can read and write in one language. What could be the strength of the class from the given alternatives? 

A bookseller purchases 11 pencils for Rs.10 and then sales them 10 pencils for Rs.11. What is his percentage of profit ? 

One side of an equilateral triangle is $12 \mathrm{cm}$ long. The midpoints of its sides are joined to from another triangle whose midpoints, in turn, are joined to form another triangle. This process continues indefinitely. Find the sum of the perimeters (in $\mathrm{cm}$) of all the triangles. 

A tired research scientist went to bed at$10$ o'clock one night after setting his alarm clock at noon the following day. When the alarm woke him up. How many hours had he slept ?

Two missiles speed directly towards each other. One at 12000 miles per hour and the other at 18000 miles per hour. Initially they arc at a distance of 1115 miles from each other. How far apart they would be exactly 30 seconds before they collide?  

In question, two sets of figures marked problem figures and answer figures are given. Which one of the answer figures will fill in the blank space in the problem figures?

Problem Figures:

Answer Figures:

In question, two sets of figures marked problem figures and answer figures are given. Which one of the answer figures will fill in the blank space in the problem figures?

Problem Figures:

Answer Figures:

Problem Figures:

Answer Figures: