please help me with this question
this is my diwali task of maths please help me cuties
Answers
QUESTION:
1. Reciprocal of 2/9 is ____
(a) 9/2 (b) 3 (c) -5 (d) -2/9
ANSWER:
Reciprocal of 2/9 is 9/2, as there is no negative sign in it so negative values are wrong. Also 9 can't be divisible by 2.
Therefore, correct answer is option (a) 9/2.
QUESTION:
2. 20/25 = 28/x if, then _____
(a) -35 (b) 20 (c) 35 (d) 1
ANSWER:
→ 20/25 = 28/x
→ 20x = 25(28)
→ 20x = 700
→ x = 35
Therefore, correct option is (c) 35.
QUESTION:
3. What is the maximum exterior angle possible for a regular polygon?
(a) 120 (b) 40 (c) 60 (d) 180
ANSWER:
Consider a regular polygon be an equilateral triangle (as it has less number of sides).
Sum of all the angles of a triangle = 180°
Let's say the side of triangle is x.
→ x + x + x = 180°
→ 3x = 180°
→ x = 60°
Therefore, the minimum interior angle possible for a regular polygon is 60°.
Maximum exterior angle possible for a regular polygon = 180° - Minimum interior angle
= 180° - 60°
= 120°
Therefore, correct option is (a) 120°.
QUESTION:
4. Diagonals are perpendicular ...
(a) square (b) rhombus (c) rectangle (d) quadrilateral
ANSWER:
Among quadrilaterals; a rhombus, a square and a kite have one pair of diagonals that are perpendicular. The diagonals of squares are equal to each other and they are perpendicular to each other.
Therefore, the correct option is (a) square.
QUESTION:
5. How many rational numbers exist between -2 and 1?
(a) 3 (b) 2 (c) 0 (d) infinity
ANSWER:
There are infinite rational numbers between -2 and 1. The rational number between two numbers can be find by using formula (a + b)/2.
Therefore, the correct option is (d) infinity.
QUESTION:
6. The range of the data: 9, 8, 6, 4, 2, 1, 10, 3 is ...
(a) 9 (b) 8 (c) 6 (d) 10
ANSWER:
The difference between higher value and lower value is known as range.
Difference = Higer value - Lower value
= 10 - 1
= 9
Therefore, the correct option is (a) 9.
QUESTION:
7. The compound interest on 50000 at 4% per annum for 2 year compounded annually is ...
(a) Rs. 4080 (b) Rs. 4000 (c) Rs. 4050 (d) Rs. 4280
ANSWER:
CI = P(1 + R/100)^T - P
CI = 50000(1 + 4/100)^2 - 50000
CI = 50000(104/100)^2 - 50000
CI = 50000(1.0816) - 50000
CI = 54080 - 50000
CI = 4080
Therefore, the correct option is (a) Rs. 4080.
QUESTION:
8. Which one of the following will have 1 at it's unit place?
(a) 16² (b) 19² (c) 15² (d) 14²
ANSWER:
16*16 = 256, 19*19 = 361, 15*15 = 225, 14*14 = 196
(Here only 19² have 1 at it's unit place.)
Therefore, the correct option is (b) 19².