The following sum is

1 + 1 - 2 + 3 - 4 + 5 - 6 ... - 20 = ?

• 10

• -10

• -11

• -9

What is the next number in the following sequence?

2, 3, 5, 6, 3, 4, 7, 12, 4, 5, 9, ....

• 10

• 20

• 13

• 6

After giving a 20% discount on the marked price to a customer, the seller's profit was 20%. Which of the following is true?

• Sale price = $\frac{\mathrm{Marked} \mathrm{price} + \mathrm{Cost} \mathrm{price}}{2}$

• Sale price < $\frac{\mathrm{Marked} \mathrm{price} + \mathrm{Cost} \mathrm{price}}{2}$

• $\frac{2}{3} (\mathrm{Marked} \mathrm{price} + \mathrm{Cost} \mathrm{price}) > \mathrm{Sale} \mathrm{price} > \frac{\mathrm{Marked} \mathrm{price} + \mathrm{Cost} \mathrm{price}}{2}$

• Sale price > $\frac{2}{3} (\mathrm{Marked} \mathrm{price} + \mathrm{Cost} \mathrm{price})$

Coordinates of a point in x, y, z space is (1, 2, 3). What would be the coordinates of its reflection in a mirror along the x, z plane?

• (-1, -2, -3)

• (1, -2, -3)

• (1, -2, 3)

• (-1, 2, 3)

You are given 100 verbs using which you have to form sentences containing at least one verb, without repeating the verbs, under the condition that the number of verbs (from this set of 100) in any two sentences should not be equal. The maximum number of sentences you can form is

• 10

• 13

• 14

• 100

A 4 × 4 magic square is given below,

1	15	14	4
12	6	7	9
8	10	11	5
13	3	2	16

How many 2 × 2 squares are there in it whose elements add up to 34?

• 6

• 9

• 4

• 5

November 9, 1994 was a Wednesday. Then which of the following is true?

• November 9, 1965 is a Wednesday and November 9, 1970 is a Wednesday.

• November 9, 1965 is not a Wednesday and November 9, 1970 is a Wednesday.

• November 9, 1965 is a Wednesday and November 9, 1970 is not a Wednesday.

• November 9, 1965 is not a Wednesday and November 9, 1970 is not a Wednesday.

If a 4 digit year (e.g. 1927) is chosen randomly, what is the probability that it is NOT a leap year?

• $\frac{3}{4}$

• $\frac{1}{4}$

• < $\frac{1}{4}$

• > $\frac{3}{4}$

219.

Three years ago, the difference in the ages of two brothers was 2 years. The sum of their present ages will double in 10 years. What is the present age of the elder brother?

• 6

• 11

• 7

• 9

Find the missing number in the sequence

61, 52, 63, 94, ..., 18, 001, 121,

• 46

• 70

• 66

• 44