Question Detail

Find the HCF of 2.1, 1.05 and 0.63

0.44
0.64
0.21
None of above

Answer: Option C

Explanation:

To solve this question quickly, first remove decimal by multiplying each term with 100,
Then terms become 210, 105, 63
Then HCF of above terms is 21,
So Answer is 0.21

1. Find the largest number of four digits which is exactly divisible by 27,18,12,15

9700
9710
9720
9730

Answer: Option C

Explanation:

LCM of 27-18-12-15 is 540.
After dividing 9999 by 540 we get 279 remainder.
So answer will be 9999-279 = 9720

2. Find the HCF of
$\begin{aligned} 2^2 \times 3^2 \times 7^2, 2 \times 3^4 \times 7 \end{aligned}$

Answer: Option B

Explanation:

HCF is Highest common factor, so we need to get the common highest factors among given values. So we got
2 * 3*3 * 7

3. Reduce $\begin{aligned} \frac{368}{575} \end{aligned}$ to the lowest terms.

$\begin{aligned} \frac{30}{25} \end{aligned}$
$\begin{aligned} \frac{28}{29} \end{aligned}$
$\begin{aligned} \frac{28}{29} \end{aligned}$
$\begin{aligned} \frac{16}{25} \end{aligned}$

Answer: Option D

Explanation:

We can do it easily by in two steps
Step1: We get the HCF of 368 and 575 which is 23
Step2: Divide both by 23, we will get the answer 16/25

4. The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is

16cm
25cm
15cm
35cm

Answer: Option D

Explanation:

So by now, you must be knowing this is a question of HCF, right.
H.C.F. of (700 cm, 385 cm, 1295 cm) = 35 cm.

5. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is

Answer: Option A

Explanation:

Let the numbers be 3x and 4x. Then, their H.C.F. = x. So, x = 4.
So, the numbers 12 and 16.
L.C.M. of 12 and 16 = 48.

Question Detail

Find the HCF of 2.1, 1.05 and 0.63

1. Find the largest number of four digits which is exactly divisible by 27,18,12,15

2. Find the HCF of
$\begin{aligned} 2^2 \times 3^2 \times 7^2, 2 \times 3^4 \times 7 \end{aligned}$

3. Reduce $\begin{aligned} \frac{368}{575} \end{aligned}$ to the lowest terms.

4. The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is

5. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is

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Question Detail

Find the HCF of 2.1, 1.05 and 0.63

1. Find the largest number of four digits which is exactly divisible by 27,18,12,15

2. Find the HCF of 22×32×72,2×34×7\begin{aligned} 2^2 \times 3^2 \times 7^2, 2 \times 3^4 \times 7 \end{aligned}

3. Reduce 368575\begin{aligned} \frac{368}{575} \end{aligned} to the lowest terms.

4. The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is

5. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is

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2. Find the HCF of
$\begin{aligned} 2^2 \times 3^2 \times 7^2, 2 \times 3^4 \times 7 \end{aligned}$

3. Reduce $\begin{aligned} \frac{368}{575} \end{aligned}$ to the lowest terms.