Sept/Oct 2024 Flashcards

1
Q

13/15 - 7/15 =

A

2/5

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2
Q

今年父子二人年龄和为36岁,2年后父亲的年龄是儿子的4倍,问:儿子今年多少岁?

A

6

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3
Q

同学们收集废旧电池,第一小组6人收集了7千克,第二小组5人收集了5千克,第三小组8人收集了7千克,哪个小组平均每人收集的多?

A

第一小组

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4
Q

在分数2/9,8/4,17/34,6/25,8/15中,是最简分数的有:

A

2/9,6/25,8/15

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5
Q

大于1/4且小于1/3的最简分数有多少个?

A

无数个

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6
Q

某超市第一天买出5/6吨水果,第二天卖出的是第一天的3/5,第三天卖出5/16吨水果,三天一共卖出多少吨水果?

A

2吨

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7
Q

班级参加演出一共18名同学,其中男同学3人,女同学15人。

为了演出需要,在现有参加人数不变的基础上,要使参加演出的女同学人数比参加演出的男同学的人数2倍少3人,则在现>有演出的人员基础上还需要增加男同学多少人

A

4

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8
Q

降12克糖放入装有128克水的甲杯中,9克糖放入装有100克水的乙杯中,5克糖放入装有52克水的丙杯中,全部溶解后可以知道哪杯水最甜?

A

丙杯水最甜

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9
Q

将3、0、8、5排列成既能被2整除,又能被5整除的最小四位数是:

A

3580

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10
Q

如果两个正整数的最大公约数是3,最小公倍数是30,则这两个数是:

A

3和30

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11
Q

若一个两位素数,将它的十位数字与个位数字对调后仍是一个两位素数则称为“无暇素数”。这样的“无暇素数”有多少个?

A

9

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12
Q

在上海地铁人民广场站,2号线每4分钟有一列车开出,8号线每6分钟有一列车开出,在上午9:00恰好2号线和8号线同时有车从该车站发车,那么到中午12:00时,恰有多少次2号线与8号线在该站同时发车?

A

[4, 6] = 12
12:00 - 9:00 = 3:00 = 180min
180 / 12 + 1 = 16

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13
Q

用长20cm、宽16cm的地砖铺地,如果能铺成一个正方形的地面,那么正方形的边长是地砖长和宽的______。

A

公倍数

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14
Q

如果甲数=3x3x5,那么它的因数有____个。

A

6

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15
Q

观察下列数:1/2,-2/3,3/4,-4/5,…,第2024个数为

A

-2023/2024

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16
Q

离原点最近的数为

A

0

17
Q

在数轴上,到原点距离不大于2的点有____个

A

无数个

18
Q

( )的绝对值为它本身

A

非负数

19
Q

-5/7 + (-4.5)+ 5/7 + (-1/2)=

A

-5

20
Q
A