In a certain deck of cards, each card has a positive integer written on it, in a multiplication game a child draws a card and multiplies the integer on the card with the next large integer. If the each possible product is between 10 and 400, then the least and greatest integer on the card would be	Choose the correct choice from the following options
A) 3 and 15 B) 3 and 20 C) 4 and 13 D) 4 and 14 E) 5 and 14
Given: 10&lt;x(x+1)&lt;400.   Now, it's better to test the answer choices here rather than to solve:   If x=3 then x(x+1)=12&gt;10 --&gt; so, the least value is 3. Test for the largest value: if x=20 then   x(x+1)=20*21= 
<gadget id="calculator">20*21</gadget>
<output>420</output>
420&gt;400   Answer: 3 and 20.
<result>B</result>
In a certain deck of cards, each card has a positive integer written on it, in a multiplication game a child draws a card and multiplies the integer on the card with the next large integer. If the each possible product is between 10 and 400, then the least and greatest integer on the card would be