2
Q:

# In an examination, a student scores 4 marks for every correct answer and loses I mark for every wrong answer. If he attempts in all 60 questions and secures 130 marks, the number of questions he attempts correctly, is:

 A) 35 B) 38 C) 40 D) 42

Explanation:

Let the number of correct answers be X.

Number of incorrect answers = (60 – X).

Therefore, 4x – (60 – x) = 130

=> 5x = 190  => x = 38

Q:

If ,  then the value of  is

 A) 8 B) 7 C) 6 D) 5

Explanation:

0 0
Q:

If , then the value of  is

 A) 2/9 B) √5/9 C) 10/9 D) 5√5/9

Explanation:

0 1
Q:

If , then the value of   is

 A) 2/3 B) 4/3 C) 2 D) 8/3

Explanation:

0 9
Q:

If  and xy+ yz + zx = 11, then the value of  is

 A) 16 B) 25 C) 36 D) 49

Explanation:

0 2
Q:

, then the value of  is

 A) 1ab B) ab C) 2ab D) 12ab

Explanation:

0 1
Q:

Simplify the following expression:

$(32×16)+(53×72)-(134×43)=?$

 A) 1221 B) 2112 C) 3621 D) 4112

Explanation:

4 281
Q:

$(311×336)-(94×123)+(511×2210)$

 A) -92 B) -132 C) 132 D) 92

Explanation:

0 409
Q:

Express in meters the sum of 0.5035 km, 332.9 cm, and 1771mm:

 A) 500 B) 510 C) 508.6 D) 58.6