Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 598 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
2. 2.🧩 A box has 3 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 28 (c) 10 (d) 21
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
4. 4.🧩 Ishaan bought 3 pens and a lunch box for ₹160 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹157 (c) ₹53 (d) ₹160
5. 5.🧩 Arjun is 12 years old. Kabir is older than Arjun. How old is Kabir? (a) 14 (b) 17 (c) 13 (d) not enough info
6. 6.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
10. 10.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) 7 PM (d) not enough info
11. 11.🧩 Aarav is 6 years old. Meera is 4 years older than Aarav. How old is Meera? (a) 11 (b) not enough info (c) 10 (d) 4
12. 12.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
15. 15.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
16. 16.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) 48 (b) not enough info (c) 13 (d) 42
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
18. 18.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
19. 19.🧩 Tara is 9 years old. Vihaan is older than Tara. How old is Vihaan? (a) 11 (b) 10 (c) 14 (d) not enough info
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
21. 21.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
22. 22.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) not enough info (c) 16 (d) 8
23. 23.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
24. 24.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
26. 26.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
27. 27.🧩 Saanvi is 7 years old. Aarav is older than Saanvi. How old is Aarav? (a) 9 (b) 8 (c) 12 (d) not enough info
28. 28.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
30. 30.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
31. 31.🧩 A box has 7 rows of apples, with 9 in each row. How many apples are in the box? (a) not enough info (b) 16 (c) 72 (d) 63
32. 32.🧩 Rohan bought 5 markers and a bag for ₹215 in all. Each marker cost the same. What did one marker cost? (a) ₹215 (b) not enough info (c) ₹210 (d) ₹43
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
34. 34.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
35. 35.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 25 (b) not enough info (c) 30 (d) 10
36. 36.🧩 Aarav is 9 years old. Vihaan is 3 years older than Aarav. How old is Vihaan? (a) 12 (b) 3 (c) 13 (d) not enough info
37. 37.🧩 A box has 5 rows of apples, with 5 in each row. How many apples are in the box? (a) 30 (b) not enough info (c) 25 (d) 10
38. 38.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) not enough info (d) 40
39. 39.🧩 Aarav bought 4 balls and a lunch box for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹37 (b) ₹146 (c) not enough info (d) ₹150
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True

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