# Numbers- Aptitude Questions and Answers - in Hindi

 Evaluate 743 x 999 ? 743 x 999 का मान होगा।का मान होगा। A) 724457 B) 784527 C) 742257 D) 74257 Correct Answer : 742257 Explanation :743 × 999 =743 × (1000 – 1) =743000 – 743 =742257 How many three digit numbers are divisible by 5? 5 से विभाजित होने वाली 3 अंकों की कितनी संख्याएँ हैं? A) 200 B) 180 C) 175 D) 10 Correct Answer : 180 Explanation :smallest 3 digit number divisible by 5 is first term, a =100 common difference ,d =5 greatest 3 digit number divisible by 5 is nth term, an =995 AP(Arithmetic Progression) an=a+(n-1)d 995=100+(n-1)5 995=95+5n 900=5n n=180 So , the three digits number which is divisible by 5 is 180 X is a whole number. If the only common factors of X and X2 are 1 and X, then X is _______? X एक पूर्ण संख्या है। यदि X और X2 के गुणनखंड 1 और X हैं, तो X _______ है? A) 1 B) a perfect square C) an odd number D) a prime number Correct Answer : a prime number Explanation :A number that is divisible only by itself and 1 is called prime number. so here X is a prime number.