# (1 + 3 + 5 + 7 + 9 + .... + 99) is equal to

1.  2050

2.  2500

3.  2005

4.   2002

4

2500

Explanation :
No Explanation available for this question

# In figure AD = DB, B = 90°, then cos ? equal to

1.

2.

3.

4.  None of these

4

Explanation :
No Explanation available for this question

# The value of sin250 + sin2100 + sin2150 + ... sin2850 + sin2900 is

1.  7

2.  8

3.  10

4.  9

4

9

Explanation :
No Explanation available for this question

# Dina can type 30 words in 1 minute and Dodo 25 words in 1 minute. 1st Dina typed for 1 minute, then Dodo typed for 1 minute and so on. In this way, typing alternately they typed 600 words. The time taken by them in typing these 600 words was

1.  22 minutes

2.  21 minutes 48 seconds

3.  21 minutes

4.   21 minutes 25 seconds

4

21 minutes 48 seconds

Explanation :
No Explanation available for this question

# If cos 0 cosec 23° = 1, the value of 0 is

1.  230

2.  370

3.  630

4.   670

4

670

Explanation :
No Explanation available for this question

# The ratio of lengths of two trains is 5 : 3 and the ratio of their speeds is 6 :5. The ratio of times taken by them to cross a pole is

1.  5:6

2.  11 : 8

3.  25 : 18

4.   27 : 16

4

25 : 18

Explanation :
No Explanation available for this question

# If x + = 6, thenx2 + =

1.  34

2.  32

3.  36

4.   38

4

34

Explanation :
No Explanation available for this question

# ABC is such that AB = 3 cm, BC = 2 cm and AC = 2.5 cm. ?DEF is similar to ?ABC. IF EF - 4 cm, then the perimeter of ?DEF is :

1.  5 cm

2.  7.5cm

3.  15 cm

4.   18 cm

4

15 cm

Explanation :
No Explanation available for this question

# If a = x+y, b = x-y, c = x + 2y, then a2 + b2 + c2 - ab - bc - ca is

1.  4y2

2.  5y2

3.  6y2

4.   7 y2

4

7 y2

Explanation :
No Explanation available for this question

1.  61 kg

2.  51.5 kg :

3.  52 kg

4.   51.2 kg

4