Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 313 · 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.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 7 PM
2. 2.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
3. 3.🧩 Rohan is 9 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 14 (b) 10 (c) 11 (d) not enough info
4. 4.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 8 PM
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 10 (b) not enough info (c) 30 (d) 25
8. 8.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
9. 9.🧩 Tara is 9 years old. Diya is older than Tara. How old is Diya? (a) 14 (b) 11 (c) 10 (d) not enough info
10. 10.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
11. 11.🧩 Tara is 7 years old. Kabir is older than Tara. How old is Kabir? (a) 8 (b) 9 (c) 12 (d) not enough info
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Diya is 7 years old. Meera is older than Diya. How old is Meera? (a) 8 (b) 12 (c) 9 (d) not enough info
14. 14.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 20 (b) not enough info (c) 24 (d) 9
15. 15.🧩 Diya bought 2 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹45 (c) ₹80 (d) not enough info
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
17. 17.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
18. 18.🧩 A box has 4 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 9 (b) 25 (c) not enough info (d) 20
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
21. 21.🧩 Nisha bought 4 balls and a lunch box for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹76 (c) not enough info (d) ₹80
22. 22.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Aarav is 12 years old. Nisha is 8 years older than Aarav. How old is Nisha? (a) 20 (b) 21 (c) not enough info (d) 8
24. 24.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 6 PM
25. 25.🧩 Kabir is 6 years old. Tara is 7 years older than Kabir. How old is Tara? (a) 7 (b) 13 (c) 14 (d) not enough info
26. 26.🧩 Kabir is 7 years old. Saanvi is older than Kabir. How old is Saanvi? (a) not enough info (b) 9 (c) 12 (d) 8
27. 27.🧩 Saanvi is 8 years old. Aarav is older than Saanvi. How old is Aarav? (a) 9 (b) 10 (c) 13 (d) not enough info
28. 28.🧩 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
29. 29.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
30. 30.🧩 Meera bought 4 pens and a bag for ₹100 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹25 (c) ₹96 (d) ₹100
31. 31.🧩 Vihaan is 10 years old. Saanvi is older than Vihaan. How old is Saanvi? (a) 12 (b) 15 (c) not enough info (d) 11
32. 32.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 3 PM
33. 33.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Aarav bought 3 pens and a water bottle for ₹80 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹77 (c) ₹26 (d) ₹80
35. 35.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
37. 37.🧩 Aarav is 9 years old. Arjun is older than Aarav. How old is Arjun? (a) 11 (b) not enough info (c) 14 (d) 10
38. 38.🧩 A box has 7 rows of apples, with 7 in each row. How many apples are in the box? (a) 14 (b) 49 (c) 56 (d) not enough info
39. 39.🧩 A box has 4 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 40 (b) not enough info (c) 32 (d) 12
40. 40.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) yes, it is certain (d) no mango is sweet

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