True False[1 Marks ]

Questions

5 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark

Reciprocal of 5⁶ is 6⁵.

Answer

False.
Solution:
Reciprocal of 5⁶ = Reciprocal of $\Big(\frac{5}{1}\Big)^6=\Big(\frac{1}{5}\Big)^6$

Question 21 Mark

If $5-1\times \text{x}=8-1,$ then $\text{x}=\frac{8}{5}$

Answer

False.

Solution:

$5^{-1}\times\text{x}=8^{-1}$

$\Rightarrow \frac{1}{5}\times \text{x}=\frac{1}{8}$

$\Rightarrow \text{x}=\Big(\frac{1}{8}\times5\Big)=\frac{5}{8}$

Question 31 Mark

654 in standard form is 6.45 × 10²

Answer

True.
Solution:
6.45 × 10² [Since the decimal point is moved 2 places to the left]

Question 41 Mark

(3⁰ + 4⁰ +5⁰) = 12.

Answer

False.
Solution:
(3⁰ + 4⁰ +5⁰) = 1 [Since a⁰ = 1for every integer a]

Question 51 Mark

27000 in standarf form is 27 × 10³

Answer

False.
Solution:
27000 = 2.7 × 10⁴ [Since the decimal point is moved 4 places to the left]

MATHS True False[1 Marks ]