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Mathematics
If a sphere has a diameter of 12 cm, then the surface area of the sphere is?
A
144? cm²
B
288? cm²
C
72? cm²
D
None of these
Correct Answer
A
Mathematics
If a rectangle’s length is 6 cm greater than its width and its perimeter is 48 cm, find its width?
A
9
B
10
C
11
D
None of these
Correct Answer
A
Mathematics
Find the perimeter of a rectangle where height is 6 more than the width?
A
2w+6
B
2w+12
C
4w+12
D
None of these
Correct Answer
C
Mathematics
A ladder makes an angle of 45 degree with the ground when placed against a wall. If the foot of the ladder is 5m away from the wall, then the height of wall is?
A
5m
B
10m
C
15m
D
None of these
Correct Answer
A
Mathematics
Find the area of a rectangle whose length is 4 and width is 3?
A
10
B
12
C
14
D
None of these
Correct Answer
A
Mathematics
The sum of all the interior angles of a pentagon is?
A
540
B
560
C
580
D
None of these
Correct Answer
A
Mathematics
What does nPr represent in permutation?
A
number of combination
B
Total number of object
C
Number of arrangements of r object select from n object
D
None of these
Correct Answer
C
Mathematics
What is the value of (1/2)°?
A
3
B
2
C
1
D
None of these
Correct Answer
C
Mathematics
A group has 15 boys and 6 girls. If 3 girls are to be selected without replacement, in how many ways can they be selected?
A
20
B
21
C
22
D
None of these
Correct Answer
A
Mathematics
What is the sum of all angles in a triangle?
A
10
B
20
C
30
D
180
Correct Answer
D