Answer - A
Explanation
In alphabetic order of `A’ is one while that of E is 5.
Answer - C
Explanation
The numbers have their square in diagonally opposite space.
Answer - D
Explanation
The numbers are changing in clockwise direction as by adding 2 and subtracting 1 alternately starting from 3. Hence missing number is 8.
Answer - C
Explanation
Half of the previous number is being placed in following space and 2 is getting place after each two steps.
Answer - B
Explanation
The number at the bottom is obtained as, $\frac{5+4}{3} = 3$ and $\frac{12+12}{3} = 8$, similarly $\frac{12+39}{3} = 17$. Therefore missing number is 17.
Answer - D
Explanation
Numbers at bottom are the difference of numbers at the top, therefore missing number is 24 - 17 =7.
Answer - C
Explanation
The numbers are obtained as $\frac{4}{1}+ \frac{6}{2} = 7$ and $\frac{45}{5} + \frac{36}{3} = 21$, similarly $\frac{7}{7}+ \frac{56}{8} = 8$.
Answer - D
Explanation
The numbers are related as 23 - 12 = 11 = 7+4 and 34 - 20 = 14 = 9 + 5, similarly 76 - 43 = 33 = 20 + 13.
Answer - C
Explanation
Numbers are obtained as, 22 + 52 = 29 and 12 +32 = 10, therefore missing number is 72 +62 = 85.
Answer - D
Explanation
It is clear that, 12+ 23 = 20 and 24+43 = 88.in this way 11+13 = 12.