A number consists of three digits of which the middle one is zero and their sum is 4. If the number formed by interchanging the first and last digits is greater than the number itself by 198, then the difference between the first and last digits is:
A solid cube of 3 cm side, painted on all its faces, is cut up into small cubes of L cm side. How many ofthe small cubes will have exactly two painted faces?
While writing all the numbers from 700 to L000, how many numbers occur in which the digit at hundred's place is greater than the digit at ten's place, and the digit at ten's place is greater than the digit at unit's place?
If Pen < Pencil, Pencil < Book and Book > Cap, then which one of the following is always true?
(a) Pen > Cap
(b) Pen < Book
(c) Pencil = Cap
(d) Pencil > Cap
A bookseller sold 'a' number of Geographytextbooks at the rate of Rs. x per book, 'a + 2'number of History textbooks at the rate of Rs. (x + 2)per book and 'a - 2' number of Mathematicstextbooks at the rate of Rs. (x ' 2) per book. What ishis total sale in Rs.?
(a) 3x + 3a
(b) 3ax + 8
(d) x3 a3
A bag contains 15 red balls and 20 black balls. Each ball is numbered either 1 or 2 or 3.20% of the red balls are numbered 1 and 40% of them are numbered 3. Similarly, among the black balls,45%arc numbered 2 and 30% are numbered 3. A boy picks a ball at random. He wins if the ball is red and numbered 3 or if it is black and numbered 1 or 2.What are the chances of his winning?
Two persons, A and B are running on a circular track. At the start, B is ahead of A and their positions make an angle of 30' at the centre of the circle. When A reaches the point diametrically opposite to his starting point, he meets B. What is the ratio of speeds of A and B, if they are running with uniform speeds?
(a) 6 : 5
(b) 4 : 3
(c) 6 : 1
(d) 4 : 2
A student has to get 40Vo marks to pass in an examination. Suppose he gets 30 marks and fails by30 marks, then what are the maximum marks in the examination?
19 boys turn out for playing hockey. Of these, 11 are wearing hockey shirts and 14 are wearing hockey pants. There are no boys without shirts and pants. What is the number of boys wearing full uniform?
Read the information given below and answer the items that follow.
A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studying in Science Commerce college and Engineering c in that order), which are situated in viz., Gujarat, Rajasthan, Assam and Kerala (not necessarily in that order). Further, it is given that-
(i) D is studying in Assam
(ii) Arts college is located in city S which is in Rajasthan
(iii) A is studying in Commerce college
(iv) B is studying in city e
(v) Science college is located in Kerala
A is studying in:
(c) city Q