CSAT Prelims 2023 | Answer Key | Set A | Q.no. 7

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[sh-rv]

My brain and my calculator cannot comprehend this logic

[nishu]

I don't applied this much mind to solve this question, it is easy to solve . Answer was 0

[ritikpandita]

Q8- 2 ANS
Because unit digit repeats after 4 powers and using divisiblity method we can easily do it

[nehasinghrajput]

Tricks
5×9×6= 0 as unit digit and when will divided by 100 as will get 0 reminder simple

[shashivibhuti]

Alternatively, we can
→85 × 87 × 89 × 91× 95 × 96
→(17×5) × 87 × 89 × 91 × (19×5) × (24×4)
→17 × 87 × 89 × 91× 19 × 24 × { 5×5×4 }
→17 × 87 × 89 × 91× 19 × 24 × 100
One of the factors is 100, so it is completely divisible. Hence, the remainder is zero.

[Mahi-mikb]

we use unit digit concept the unit digit will be 0. Then divided by 10, 100 is remainder will be 0

[nehasinghrajput]

2nd ques me
2 ka power 9*7*5*3*1 if we will multiply all will get 5 as unit digit and further if divided by 4 will get 1 reminder
So 2 ^1=2 ans simple

[Wa-zir-xzpl]

After watching it, Ye mein kaha aagaya.

[leninedu]

Unit digit method = 5*6=0 then reminder is 0

[dsbsstudio]

Any one please tell answer to second question

[SupravaPaul-rm]

1 -7395+8099+9220
=24714
24714÷10
=Q 2471
R 4
Ans 4(D)

[johnmyrthong]

Wtf I don't understand anything😂😂😂😂😂