Consider the following matrix:
3 8 10 2 ? 1
6 56 90 2 20 0
What is the missing number at `?` in the matrix?

What is the missing number `X` of the series 7, X, 21, 31, 43?

Four cardboard pieces of specific shapes are shown in the following figure:

Which one of the following figures given can be formed by joining these pieces together?

In a test, a candidate attempted only 8 questions and secured 50% marks in each of the questions. If he obtained a total of 40% in the test and all questions in the test carried equal marks, how many questions were there in the test?

A father is nine times as old as his son and the mother is eight times as old as the son. The sum of the fathers and the mothers age is 51 years. What is the age of the son ?

Four persons A, B, C and D consisting of two married couples are in a group. Both the women are shorter than their respective husbands. A is the tallest among the four. C is taller than B. D is Bs brother. In this context, which one of the following statements is not correct ?

Consider the following statements :
1. A man had a wife, two sons and daughters in his family
2. The daughters were invited to a feast and the male members of the family went out to take part in a pienic
3.The mans father did not return from his work.
Which of the following statement is true?

Geeta: Naresh has become a better boxer since he started meditation.
Radha: Impossible, A boxers most important asset is his aggressiveness.
Radhas statement reflect her belief that

All good athletes want to win and all athletes who want to win eat a well-balanced diet; therefore all athletes who do not cat a well-balanced diet are bad athletes.
The best conclusion from this statement is that

What is the most logical, rational and crucial message that is implied in the above passage?