What number is 2nd in the series 26,forty and seven?这是美国白宫的问题.

What number is 2nd in the series 26,forty and seven?这是美国白宫的问题. WHAT IS THIS THING CALLED SCIENCE 2ND EDITION怎么样 What is you number what is< > telephone number what is the multiplicative inverse of the complex number 2-i?multiplicative inverse 是什么? What is my number?( ) number is 8. I don'd know A,how many his telephone number B,what is his telephone number 英语,What's your number?I'm Number 2 in Row 1.为什么number前不加in What is your phone number What number is this bus? what is his telephone number ? What is your photo number? what number do I dial IF I add 8 to five times a certain number,the answer is 43.what is the number?中文一定要! if 4 less than 3 times a certain number is 2 more than the number,what is the number 英语翻译If f less than 3 times a certain number is 2more than the number,what is the number? i don't know what is tracking number i don't know what tracking number is 那一句话对 is应该放在那里为什么 If my number is up,what shall I do?I need answer.