3216: Product of 82540027 and 43253 is:
(a) 3570403787831
(b) 3570403787832
(c) 3570403787833
(d) 3570403787834
3217: A person has 4 coins each of different denomination. What is the number of different sums of money the person can form (using one or more coins at a time)?
(A) 15
(B) 16
(C) 10
(D) 12
3218: With reference to Bitcoins, sometimes seen in the news, which of the following statements is/are correct?
1. Bitcoins are tracked by the Central Banks of the countries.
2. Anyone with a Bitcoin address can send and receive Bitcoins from anyone else with a Bitcoin address.
3. Online payments can be sent without either side knowing the identity of the other.
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
3219: World's longest ruling head of government is from:
(a) Switzerland
(b) Cuba
(c) Zimbabwe
(d) New Zealand
3220: Chlorophyll is a naturally occurring chelate compound in which central metal is
(a) Magnesium
(b) Copper
(c) Calcium
(d) Iron