\((1)\)单项式\(-4πxy^{2}\)的系数是_____.
\((2)\)若\(3x+2\)与\(1-2x\)互为相反数,则\(x\)的值是_____.
\((3)\)已知\(∠A=62^{\circ}38′\),则\(∠A\)的余角是_____.
\((4)\)今年妈妈\(26\)岁,儿子\(2\)岁,_____年后,母亲的年龄是儿子年龄的\(5\)倍.
\((5)\)如图,在线段\(AB\)上有两点\(C\)、\(D\),\(AB=24 cm\),\(AC=6 cm\),点\(D\)是\(BC\)的中点,则线段\(AD=\)_____\(cm\).
\((6)\)观察下列图形:
它们是按一定规律排列的,依照此规律,第\(n\)个图形中共有_____个五角星\((n\)为正整数\()\)