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Kashi Jha
Kashi Jha
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study24x7Kashi Jha

Kashi Jha

Studied cbse at dav public school
Senior Teacher at Jessica coaching institute
Live in North West Delhi,India, Delhi
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15years of experience in education sector,teaching maths.in reputed institute .

Kashi Jha
10 Jun 2020 09:23 PM study24x7 study24x7
https://www.study24x7.com/article/1010/necessity-is-t...

“Necessity is the mother of invention ” - Study24x7

Without need, the invention would not be possible and without invention , life would not be so easy and comfortable as it is in the current time. Fr
Class 8 Class 9 Class 10
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Kashi Jha
02 Jun 2020 07:05 PM study24x7 study24x7

A man has 1044 candles. After burning,he can make new candle from 9 stubs left behind . Find the maximum number of candles that can be made .

Class 8 Class 9 Class 10
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Kashi Jha
29 May 2020 06:12 PM study24x7 study24x7

There  is a three  digit  number, N=xyz; where  x,y,z are different  digit. If x^2 +y^2=41,x^2+z^2=89 andy^2+z^2=80,find N= ?

A

458

B

854

C

548

D

485

Class 8 Class 9 Class 10
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Kashi Jha
29 May 2020 06:02 PM study24x7 study24x7

A number  is successively divided by 5,6,and 8 leaving  3,4 and 7 as remainders  are respectively. What will be the remainders if the order of dividers be reversed?

A

4,5,6

B

1,5,4

C

3,4,7

D

1,4 7

Class 8 Class 9 Class 10
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Kashi Jha
29 May 2020 05:52 PM study24x7 study24x7

Find the last digit of the sum 1!+2!+3!+4!+..........+49!

A

3

B

6

C

4

D

5

Class 8 Class 9 Class 10
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Kashi Jha
29 May 2020 05:46 PM study24x7 study24x7

10th10th

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Kashi Jha
26 May 2020 06:26 PM study24x7 study24x7

the right most non_zero digit of (80)^1365 is ?

A

3

B

5

C

6

D

8

Class 8 Class 9 Class 10
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Kashi Jha
24 May 2020 11:55 AM study24x7 study24x7

(A-1)^2+(B-2)^2+(c-3)^2+(d-4)^2=0 then A×B×C×D+1=?

A

25

B

24

C

47

D

12

Class 8 Class 9 Class 10
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Kashi Jha
23 May 2020 08:53 PM study24x7 study24x7

The number of prime numbers less than 100 whose sum of the digit is 2 is

A

2

B

3

C

4

D

5

Class 8 Class 9 Class 10
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Kashi Jha
23 May 2020 08:45 PM study24x7 study24x7

Let a,b,c,d be +be integers where a+b+c=53,b+c+d=51,c+d+a=57 and d+a+b=58 then the greatest  and smallest numbers  among a,b,c,d are respectively 

A

a and c

B

b and c

C

C and d

D

a and d

Class 8 Class 9 Class 10
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