3. What must be added to the largest 4-digit number to get smallest number of five different digits formed by 1, 2, 0, 3, 4?
4. Express sum of Roman numerals XL and CXX in roman numeral.
5. Capacity of a tank is 500,000 cm. The family used up 110 1 of water in cooking, drinking and bathing. 100 1
Answers
1) We know that, the largest four digit number is 9999. And with the given digits that is 1,2,0,3 and 4 , the smallest five digit number will be 10234.
If wee subtract, 9999 from 10234 then we get 235.
The largest four digit number is 9999. Add 235 to this, you get 10234, which is the smallest five digit number that can be formed using 0, 1, 2, 3, 4
Ans:- 235
2) The roman numeral XL = 40
The roman numeral CXX = 120
Therefore 40 + 120 = 160
The roman numeral of 160 = CLX
Ans = CLX
3) 1litre = 1000 cm ^ 3
(500 x 1000) cm³ = 500 litre
capacity of tank = 500 litre
water used in cooking, drinking and bathing = 110 litre
water used in washing car = 100 litre
water used in washing ce = 100Iitre
total water used = 110 + 100 + 100
= 310 litre =
water remaining in tan k = 500 - 310
= 190 litre or (190 x 1000)cm³
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