Answer: B) Air Explanation: Clearly, though all the alternatives may form a part of the atmosphere, the air is the most vital part, without which there can be no atmosphere. So, the answer is (b).

Answer: B) 21,14 Explanation: Putting A=1, B=2, C=3,..., M=13,....,X=24,Y=25, Z=26, we have :        JR = J + R2 + 2 = 10 + 18 2 + 2 = 16       CK = C + K2 + 2 =  3 + 112 + 2 = 9       TX = T + X2+ 2 = 20 + 242 + 2 = 24       OS = O + S2 + 2 = 15 + 192 + 2 = 19        So, the missing numbers are :       21 and 14       Hence, the answer is (b).

Answer: B) 28 Explanation: Using Correct Symbols , We have : Given expression = 30 / 2 + 3 x 6 - 5 = 15 + 18 - 5 = 28

Answer: B) -, +, x Explanation: Clearly 5 - 0 + 3 X 5 = 20

Answer: A) A + C = B + D Explanation: Given,   A + B = 2C ----(i)   C + D = 2A----(ii)   Adding (i) and (ii) we get : A + B + C + D = 2C + 2A   =>  B + D = A + C

Answer: C) 3, 2, 5, 1, 4 Explanation: All the given words stand for 'Joy', but the intensity increases in the order - Ambivalence, Happiness, Pleasure, Euphoria, Ecstasy. Thus the correct order is 3, 2, 5, 1, 4. Hence the answer is (C)

Answer: D) 5, 4, 2, 3, 1 Explanation: Clearly, Here are the names of parts of a hand, Which may be arranged  (i) from top to bottom, i.e, Shoulder, Elbow, Wrist, Palm, Finger - Which is 1, 3, 2, 4, 5  (or) (ii) from bottom to top, i.e, Finger, Palm, Wrist, Elbow, Shoulder - Which is 5, 4, 2, 3, 1 Out of these, the sequence 5, 4, 2, 3, 1 is given in the alternatives provided. Hence, the answer is (D).

Answer: B) 301 Explanation: Clearly, the required number would be such that it leaves a remainder of 1 when divided by 3, 4, 5, or 6 and no remainder when divided by 7. Thus, the number must be of the form (L.C.M of 3, 4, 5, 6) x + 1 i.e., (60x + 1 ) and a multiple of 7. Clearly, for x = 5, the number is a multiple of 7. So the number is 301.