Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 66 · 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.🥭 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) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
4. 4.🧩 Diya bought 4 kites and a lunch box for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) not enough info (c) ₹27 (d) ₹106
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
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.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
8. 8.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 12 (c) 36 (d) 42
9. 9.🧩 A box has 4 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 25 (b) 20 (c) 9 (d) not enough info
10. 10.🧩 Aarav bought 2 balls and a lunch box for ₹170 in all. Each ball cost the same. What did one ball cost? (a) ₹170 (b) ₹168 (c) ₹85 (d) not enough info
11. 11.🧩 Arjun is 12 years old. Ananya is older than Arjun. How old is Ananya? (a) not enough info (b) 13 (c) 14 (d) 17
12. 12.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 5 PM
13. 13.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
15. 15.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 2 PM (d) not enough info
16. 16.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
17. 17.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
18. 18.🧩 Diya is 11 years old. Nisha is older than Diya. How old is Nisha? (a) 13 (b) 12 (c) 16 (d) not enough info
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) 60 (c) 12 (d) not enough info
22. 22.🧩 Vihaan bought 6 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹300 (b) ₹55 (c) not enough info (d) ₹50
23. 23.🧩 Aarav bought 4 kites for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) ₹180 (c) not enough info (d) ₹45
24. 24.🧩 Vihaan is 8 years old. Aarav is 9 years older than Vihaan. How old is Aarav? (a) 18 (b) 9 (c) not enough info (d) 17
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
27. 27.🧩 Rohan bought 3 pens and a bag for ₹255 in all. Each pen cost the same. What did one pen cost? (a) ₹252 (b) ₹85 (c) not enough info (d) ₹255
28. 28.🧩 Diya is 12 years old. Tara is 6 years older than Diya. How old is Tara? (a) 18 (b) not enough info (c) 6 (d) 19
29. 29.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
30. 30.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Meera bought 5 balls for ₹50 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹15 (c) ₹50 (d) ₹10
32. 32.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
33. 33.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
34. 34.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) not enough info (b) 6 (c) 60 (d) 12
35. 35.🧩 Vihaan is 9 years old. Meera is older than Vihaan. How old is Meera? (a) 14 (b) 10 (c) not enough info (d) 11
36. 36.🧩 Meera is 9 years old. Saanvi is older than Meera. How old is Saanvi? (a) 14 (b) not enough info (c) 11 (d) 10
37. 37.🧩 A box has 7 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 35 (b) not enough info (c) 40 (d) 12
38. 38.🧩 Vihaan is 12 years old. Tara is older than Vihaan. How old is Tara? (a) 13 (b) 14 (c) 17 (d) not enough info
39. 39.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True

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