Which two signs should be interchanged to make the given equation correct?
 48 ÷ 12 × 3 + 5 − 4 = 21

Which letter-cluster will replace the question mark (?) to complete the given series?

ZUPK, YTOJ, ?, WRMH, VQLG

Which two numbers from amongst the given options should be interchanged to make the given equation correct?
 248 ÷ 4 + 184 ÷ ( 4 × 6 – 2 × 8) = 77

Which two signs need to be interchanged to make the following equation correct?

73 – 13 × 42 ÷ 14 + 56 = 56

Select the option that is related to the third word in the same way as the second word is related to the first word. (The words must be considered as meaningful English words and must not be related to each other based on the number of letters/number of consonants/vowels in the word.)
 Bee: Beehive :: Dog: ?

Select the number from among the given options that can replace the question mark (?) in the following series.
 121, 144, 169, ?, 225, 256 

Select the option in which the two numbers are related in the same way as are the numbers in the given number-pair.
 (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)
17 : 19

If A + B means that A is the brother of B, A × B means that A is the sister of B, A ÷ B means that A is the father of B then which of the following expression shows that P is the brother of R?