Tag: maths

Questions Related to maths

$10$ crore= ....... million

maths square and square root scientific notation use of exponents power of 10

  1. 10

  2. 100

  3. 1

  4. 1000

Show answer
Correct Option: B
Explanation:

10 crores (or 1000 lakhs) is equal to 100 million (0.1 billion)

How many symbols are used in Roman numerals ?

maths square and square root scientific notation use of exponents power of 10

  1. 7

  2. 6

  3. 9

  4. 12

Show answer
Correct Option: A
Explanation:

There are seven basic symbols,

$I, V, X, L, C, D$ and $M$.

 

Hence, this is the answer. 

Which of the following are NOT correctly matched?

maths square and square root scientific notation use of exponents power of 10

  1. I = 7

  2. X = 10

  3. V = 2

  4. XII = 12

Show answer
Correct Option: A,C
Explanation:

We know that

$I=1, V=5, X=10,XII = 12$

So, $V$ can not equal to $2$ and $I$ can not equal to $7$

Hence, this is the answer.

A number which is a factor of every number is

maths square and square root scientific notation use of exponents power of 10

  1. 0

  2. 1

  3. 2

  4. none of these

Show answer
Correct Option: B
Explanation:

1 is the factor of every number .

Which option has same value as $10+10^3$

maths square and square root scientific notation use of exponents power of 10

  1. $2.0\times 10^3$

  2. $8.0\times 10^3$

  3. $4.0\times 10^1$

  4. $1.01\times 10^3$

Show answer
Correct Option: D
Explanation:

$10+{ 10 }^{ 3 }=10+1000=1010=1.01\times { 10 }^{ 3 }$

So correct answer will be option D

Write $1000000+200000+70000$ in scientific notation.

maths square and square root scientific notation use of exponents power of 10

  1. $1.27\times 10^5$

  2. $1.27\times 10^6$

  3. $3.7\times 10^6$

  4. $1.9\times 10^5$

Show answer
Correct Option: B
Explanation:

$1000000+200000+70000=1270000$

$\therefore 12700000=1.27\times 10^6$
Ans-Option $B$.

Write $4.5\times 10^5$ in decimal form

maths square and square root scientific notation use of exponents power of 10

  1. $450000$

  2. $45000$

  3. $4500$

  4. $4500000$

Show answer
Correct Option: A
Explanation:

$4.5\times 10^5=450000$

Ans-Option $A$.

Express $0.008712$ in scientific notation.

maths square and square root scientific notation use of exponents power of 10

  1. $8.712\times 10^3$

  2. $8.712\times 10^{-3}$

  3. $8.712\times 10^{-4}$

  4. $8.712\times 10^{-2}$

Show answer
Correct Option: B
Explanation:

$0.008712=8.712\times 10^{-3}$

Ans-Option $B$

Write $50000+4000+20+9$ in standard form.

maths square and square root scientific notation use of exponents power of 10

  1. $54290$

  2. $5429$

  3. $54209$

  4. $54029$

Show answer
Correct Option: D
Explanation:

We need to write it in a standard form:

$50000+4000+20+9$
$=54000+20+9$
$=54020+9$
$=54029$
Ans-Option $D$.

Write $8.73\times 10^7$ in standard form.

maths square and square root scientific notation use of exponents power of 10

  1. $8730000$

  2. $873000$

  3. $87300000$

  4. $83700000$

Show answer
Correct Option: C
Explanation:

$8.73\times 10^7=87300000$

Ans-Option $C$