Page 297 - ICSE Math 8

Question Bank

TRUE OR FALSE
1. Zero is also an irrational number.
2. Absolute value of a rational number is always non-negative.
n
3. x = x × x × x × x × ... n times is known as power notation.
0
4. (x) = 0
5. 729 is a perfect square.
2
6. (0.04) = 0.0160
7. The cube of a negative number is always positive.
8. The cubes of the numbers ending with 7 end with 9.
9. The sum, abc + bca + cab, is exactly divisible by 111.
10. The difference between abc and cba is always a multiple of 89.
11. A set which contains only one element is called a null set.

12. The sets that have at least one element in common are called overlapping sets.
13. Percentages are fractions with 100 as numerator.
14. 25% of 60 is 12.
15. A ratio has no units.
16. In a proportion, the first and the fourth terms are called means and the second and the third terms are
called extremes.
17. The weight of a rock and the force required to move it are in inverse variations.
18. The height at which a kite is flying and the length of the thread are in direct variation.
19. If a ball is bought for ` 55 and sold for ` 75, then a profit is made.
20. A single discount equivalent to two successive discounts of 15% and 10% is 25%.
21. Rate of interest is the interest on every ` 100 for a fixed time period.
22. In simple interest, to find the time period, the day on which money is borrowed and the day on which
money has to be returned both are taken into account.
23. A combination of one or more constants and variables is a variable.
24. A term is a constant or a variable or a combination of both connected by a plus or minus sign.
2
2
25. (a + b) and (a – b) are known as perfect square binomial.
2
x + 1 x + 1
26. If = 2 , the value of = 4 .
x x 2
27. Algebraic expressions also have factors.
28. If a polynomial is divisible by one and itself, it is called composite polynomial.
29. In a linear equation, the highest power of the the variables is 2.
30. The value of the variable that truly satisfies both the sides of an equation is known as solution or root
of the equation.
31. A plane has thickness and is finite.
32. A circle is a polygon.
33. A convex quadrilateral can be constructed if 4 sides and 1 diagonal are given.
34. A parallelogram is a quadrilateral in which both pairs of opposite sides are equal.

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